I have to assume your gun is a Marlin 39a, not a model 39. These guns are similar, but the 39 began in 1922 until 1938, while the 39a started in 1939. A "Y" prefix would make your gun a 1964 model.
Your marlin model 336 RC(regular carbine) was made by marlin in 1965.
The K prefix to your serial number indicates that your marlin model 336RC(regular carbine) was made by marlin in 1953.
Your marlin model 336 sc (sport carbine) was made in 1953.
Cannot be answered unless you provide a serial number to your Marlin model 336RC(regular carbine).
Your Marlin model 336cs(Carbine Sporter) was made in the year 1989,with the serial number that you have provided.
Your Marlin model 336RC(regular carbine) was made by marlin in the year 1955.
$500
your marlin 336 RC(regular carbine) was made in 1953.
your marlin regular carbine (RC) was made in 1958-1959.
your marlin model 336 RC(regular carbine) was made in 1948.
Your serial number indicates that your Marlin model 336c(carbine) was made in the year 1980.
With the serial number that you supplied,your Marlin model 336RC (regular carbine) was made in the year 1966.